Steam Reforming of Dimethyl Ether over Coupled Catalysts of CuO-ZnO-Al2O3-ZrO2 and Solid-acid Catalyst

摘要/Abstract

摘要： Steam reforming(SR) of dimethyl ether(DME) was investigated for the production of hydrogen for fuel cells.The activity of a series of solid acids for DME hydrolysis was investigated.The solid acid catalysts were ZSM-5 [Si/Al=25,38 and 50:denoted Z(Si/Al)] and acidic alumina(γ-Al₂O₃) with an acid strength order that was Z(25)>Z(38)>Z(50)>γ-Al₂O₃.Stronger acidity gave higher DME hydrolysis conversion.Physical mixtures containing a CuO-ZnO-Al₂O₃-ZrO₂ catalyst and solid acid catalyst to couple DME hydrolysis and methanol SR were used to examine the acidity effects on DME SR.DME SR activity strongly depended on the activity for DME hydrolysis.Z(25) was the best solid acid catalyst for DME SR and gave a DME conversion>90% [T=24℃,n(H₂O)/n(DME)=3.5,space velocity=1179 ml·(g cat)^-1·h^-1,and P=0.1MPa].The influences of the reaction temperature,space velocity and feed molar ratio were studied.Hydrogen production significantly depended on temperature and space velocity.A bifunctional catalyst of CuO-ZnO-Al₂O₃-ZrO₂ catalyst and ZSM-5 gave a high H₂ production rate and CO₂ selectivity.

关键词: hydrogen production, dimethyl ether, steam reforming, hydrolysis, solid-acid catalyst, CuO-ZnO catalyst

Abstract: Steam reforming(SR) of dimethyl ether(DME) was investigated for the production of hydrogen for fuel cells.The activity of a series of solid acids for DME hydrolysis was investigated.The solid acid catalysts were ZSM-5 [Si/Al=25, 38 and 50:denoted Z(Si/Al)] and acidic alumina(γ-Al₂O₃) with an acid strength order that was Z(25)>Z(38)>Z(50)>γ-Al₂O₃.Stronger acidity gave higher DME hydrolysis conversion.Physical mixtures containing a CuO-ZnO-Al₂O₃-ZrO₂ catalyst and solid acid catalyst to couple DME hydrolysis and methanol SR were used to examine the acidity effects on DME SR.DME SR activity strongly depended on the activity for DME hydrolysis.Z(25) was the best solid acid catalyst for DME SR and gave a DME conversion>90% [T=24℃, n(H₂O)/n(DME)=3.5, space velocity=1179 ml·(g cat)^-1·h^-1, and P=0.1MPa].The influences of the reaction temperature, space velocity and feed molar ratio were studied.Hydrogen production significantly depended on temperature and space velocity.A bifunctional catalyst of CuO-ZnO-Al₂O₃-ZrO₂ catalyst and ZSM-5 gave a high H₂ production rate and CO₂ selectivity.

Key words: hydrogen production, dimethyl ether, steam reforming, hydrolysis, solid-acid catalyst, CuO-ZnO catalyst

冯冬梅, 左宜赞, 王德峥, 王金福. Steam Reforming of Dimethyl Ether over Coupled Catalysts of CuO-ZnO-Al₂O₃-ZrO₂ and Solid-acid Catalyst[J]. , 2009, 17(1): 64-71.

FENG Dongmei, ZUO Yizan, WANG Dezheng, WANG Jinfu. Steam Reforming of Dimethyl Ether over Coupled Catalysts of CuO-ZnO-Al₂O₃-ZrO₂ and Solid-acid Catalyst[J]. , 2009, 17(1): 64-71.

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Steam Reforming of Dimethyl Ether over Coupled Catalysts of CuO-ZnO-Al₂O₃-ZrO₂ and Solid-acid Catalyst

Steam Reforming of Dimethyl Ether over Coupled Catalysts of CuO-ZnO-Al₂O₃-ZrO₂ and Solid-acid Catalyst

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